* lang/qt/src/Makefile.am (qgpgme_sources): Add listallkeysjob.cpp.
* lang/qt/src/listallkeysjob.cpp: New.
* lang/qt/src/listallkeysjob.h (enum ListAllKeysJob::Option,
typedef ListAllKeysJob::Options, ListAllKeysJob::setOptions,
ListAllKeysJob::options): New.
* lang/qt/src/qgpgmelistallkeysjob.cpp (list_keys): Set context flag
"no-auto-check-trustdb" if requested.
(QGpgMEListAllKeysJob::start, QGpgMEListAllKeysJob::exec): Add options
to call of list_keys.